Failure mechanisms in ballistic performance of Ti–6Al–4V targets having equiaxed and lamellar microstructures

Zheng, Chao; Wang, Fuchi; Cheng, Xingwang; Liu, Jinxu; Ke-qin, FU; Liu, Tengteng; Zhu, Zhiwen; Yang, Kaiwen; Peng, Meiqi; Jin, Di

doi:10.1016/j.ijimpeng.2015.06.017

Cited by 48 publications

(18 citation statements)

References 30 publications

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“…Such a result [17] was obtained for projectiles of the calibre of 12 mm projectiles at a velocity of ≈1000 m/s. Similar conclusion (about the advantage of the globular-type microstructure) follows from the analysing a lot of tests for the same alloy after different types of thermomechanical treatment (i.e., with different microstructure) [5]. Above-mentioned and our results unambiguously indicate about significant influence of the microstructure of titanium alloys on their resistance with respect to the impact ballistic damage or even destruction.…”

Section: Peculiarities Of the Damaged Area Depending On The T110 Ti-asupporting

confidence: 89%

“…We have to note that in spite of a large number of the works dealing with investigation of ballistic resistance of titanium alloys, there are no works paying attention to the microstructure effect. only works [5,17] showed that globular-type microstructure of ti-6Al-4V alloy is more resistant as compared with the lamellar-type microstructure. Such a result [17] was obtained for projectiles of the calibre of 12 mm projectiles at a velocity of ≈1000 m/s.…”

Section: Peculiarities Of the Damaged Area Depending On The T110 Ti-amentioning

confidence: 99%

“…[1,2]. titanium alloys are also successfully used for military applications [3][4][5][6], in particular for the manufacture of armoured elements of battlefield vehicles and military equipment, as well as for personnel protection. replacement of traditional steel armour elements on titanium ones having comparable strength characteristics of these materials can significantly reduce the weight of structures and increase the period of their operation.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Ивасишин¹,

Markovsky²,

Savvakin³

et al. 2019

Usp. Fiz. Met.

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titanium-based materials, which combine high strength and hardness of surface layer along with sufficient ductile characteristics of the matrix metal, are very promising for various applications, particularly, as armoured components in military-industrial complex. Above-mentioned combination of properties can be achieved by means of the creation of multilayer structures, which consist of layers possessing different physical and mechanical properties. In the present study, microstructure peculiarities, mechanical and antiballistic protection properties of the layered tibased materials are investigated. two different ways were used for fabrication of such the layered structures. the first one is a conventional metallurgical (ingotwrought) method followed by the surface rapid heat treatment of the ті-6Al-4V and t110 alloys for fabrication of graded structures with different mechanical properties over the material depth. the second one is an elemental powder metallurgy method for fabrication of the structures combining layers of the ti-6Al-4V alloy and composites based on it and hardened with tic or tib particles. ballistic tests of the obtained materials are carried out for different types of projectiles with different kinetic energy and hardness of the core; features of the penetration of the hitting elements are performed depending on the material structural state. It is proved that materials with graded and layered structures demonstrate undeniable advantages in the antiballistic protection characteristics as compared with homogeneous alloys of the same thickness.

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Section: Peculiarities Of the Damaged Area Depending On The T110 Ti-asupporting

confidence: 89%

Section: Peculiarities Of the Damaged Area Depending On The T110 Ti-amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Ивасишин¹,

Markovsky²,

Savvakin³

et al. 2019

Usp. Fiz. Met.

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show abstract

“…However, owing to its relatively high density, steel offers no advantage for weight reduction and, despite its low density, aluminum has poor mechanical properties. In recent years, titanium alloys have been widely investigated for armor applications due to attributes such as their high specific strength, excellent corrosion resistance, and non-magnetic properties [ 19 , 20 , 21 , 22 ]. Monolithic titanium plates are prone to shear plugging [ 23 , 24 ] and back spalling [ 19 ] during impact, and the use of titanium alloys to produce composite plates has attracted increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Layer Sequence on the Ballistic Performance and Failure Mechanism of Ti6Al4V/CP-Ti Laminated Composite Armor

Fan

Zhu

2020

Materials

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The effect of the layer sequence on the ballistic performance of Ti6Al4V (35 mm)/CP-Ti (5 mm) laminated composite armor, against a 12.7 mm armor piercing projectile, was systematically investigated, both experimentally and computationally. By introducing the Johnson–Cook constitutive model and fracture criterion, the penetrating process of the composite plate was well-simulated. Furthermore, the influence of the layer sequence on the ballistic performance and failure mechanism of the composite plate was evaluated from the perspective of energy absorption and the stress distribution. Numerical simulation results of the macro morphology and penetration depth agreed well with the experimental results. The results showed that the energy absorption histories of each layer and stress distribution of the composite plate were found to be significantly affected by the arrangement sequence. The ballistic performance of Ti6Al4V/CP-Ti was far superior to that of CP-Ti/Ti6Al4V because more energy was absorbed in the early stage of the penetration process, thereby reducing the damage to the rear face. Further studies showed that the first principal stress in both structures was radially distributed in space, but was mainly concentrated at the rear face when the CP-Ti was placed at the front. Therefore, this stress induced cracking and failure in that region and, consequently, lowered the overall ballistic performance.

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“…However, for a given case of strength, the performance was improved with an increase of the critical fracture strain. Zheng et al [ 14 ] studied the failure mechanism associated with the ballistic performance of Ti6Al4V targets with equiaxed and lamellar microstructures after heat treatment against a 12.7 mm AP projectile. The failure mechanisms of these targets were ductile hole enlargement and brittle fragmentation, respectively, and the difference between the mechanisms was attributed mainly to the distinctly different propagating features of ASBs.…”

Section: Introductionmentioning

confidence: 99%

The Microstructural Difference and Its Influence on the Ballistic Impact Behavior of a Near β-Type Ti5.1Al2.5Cr0.5Fe4.5Mo1.1Sn1.8Zr2.9Zn Titanium Alloy

et al. 2020

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In this work, a near β-type Ti5.1Al2.5Cr0.5Fe4.5Mo1.1Sn1.8Zr2.9Zn alloy was hot-rolled at the temperature of 800–880 °C with a thickness reduction of 87.5% and then heat-treated with the strategy of 880 °C/1 h/air cooling (AC) + 650 °C/3 h/AC. The microstructure difference between the hot-rolled and heat-treated titanium alloys and its influence on the ballistic impact behavior of the hot-rolled and heat-treated titanium alloys were analyzed. The microstructural investigation revealed that the average size of the acicular secondary α phase (αs) dropped from 75 to 42 nm, and the corresponding amount of this phase increased significantly after heat treatment. In addition, the dislocation density of the α and β phases decreased from 0.3340 × 1015/m2 and 4.6746 × 1015/m2 for the hot-rolled titanium alloy plate to 0.2806 × 1015/m2 and 1.8050 × 1015/m2 for the heat-treated one, respectively. The high strength of the heat-treated titanium alloy was maintained, owing to the positive contribution of the acicular secondary α phase. Furthermore, the critical fracture strain increased sharply from 19.9% for the hot-rolled titanium alloy plate to 23.1% for the heat-treated one, thereby overcoming (to some extent) the constraint of the strength–ductility trade-off. This is mainly attributed to the fact that the dislocation density and the difference between the dislocation densities of the α and β phases decreased substantially, and deformation localization was effectively suppressed after heat treatment. Damage to the hot-rolled and heat-treated titanium alloy plates after the penetration of a 7.62 mm ordinary steel core projectile at a distance of 100 m was assessed via industrial computer tomography and microstructure observation. The results revealed that a large crack (volume: 2.55 mm3) occurred on the rear face and propagated toward the interior of the hot-rolled titanium alloy plate. The crack tip was connected to a long adiabatic shear band with a depth of 3 mm along the thickness direction. However, good integrity of the heat-treated titanium alloy plate was maintained, owing to its excellent deformation capability. Ultimately, the failure mechanism of the hot-rolled and heat-treated titanium alloy plates was revealed by determining the crack-forming reasons in these materials.

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Failure mechanisms in ballistic performance of Ti–6Al–4V targets having equiaxed and lamellar microstructures

Cited by 48 publications

References 30 publications

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Effect of the Layer Sequence on the Ballistic Performance and Failure Mechanism of Ti6Al4V/CP-Ti Laminated Composite Armor

The Microstructural Difference and Its Influence on the Ballistic Impact Behavior of a Near β-Type Ti5.1Al2.5Cr0.5Fe4.5Mo1.1Sn1.8Zr2.9Zn Titanium Alloy

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